HU900204D0 - Process for selective etherification - Google Patents

Process for selective etherification

Info

Publication number
HU900204D0
HU900204D0 HU90204A HU20490A HU900204D0 HU 900204 D0 HU900204 D0 HU 900204D0 HU 90204 A HU90204 A HU 90204A HU 20490 A HU20490 A HU 20490A HU 900204 D0 HU900204 D0 HU 900204D0
Authority
HU
Hungary
Prior art keywords
carbon atoms
chem
hydrogen
alkyl
acetal
Prior art date
Application number
HU90204A
Other languages
Hungarian (hu)
Other versions
HU208533B (en
HUT53628A (en
Inventor
Chitoshi Hatanaka
Satoru Oi
Original Assignee
Takeda Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takeda Chemical Industries Ltd filed Critical Takeda Chemical Industries Ltd
Publication of HU900204D0 publication Critical patent/HU900204D0/en
Publication of HUT53628A publication Critical patent/HUT53628A/en
Publication of HU208533B publication Critical patent/HU208533B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D307/56—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D307/62—Three oxygen atoms, e.g. ascorbic acid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Furan Compounds (AREA)
  • Cosmetics (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

There is disclosed an improved process for substitution of the hydroxy group at 2-position of an ascorbic acid derivative according to the following reaction scheme: <CHEM> wherein R<0> is hydrogen, alkyl having 1 to 6 carbon atoms, phenyl or a group of the formula <CHEM> (wherein X is two hydrogen atoms, or acetal or ketal residue); R<1> is an alkyl or alkenyl group having up to 22 carbon atoms which may be substituted with phenyl or alkoxy having 1 to 22 carbon atoms; Y is halogen or optionally substituted sulfonyloxy; R is hydrogen, or primary, secondary or tertiary alkyl having 1 to 10 carbon atoms; and Z is an alkali metal or an alkali earth metal. There is also disclosed hydrolysis of the following scheme: <CHEM> wherein R<1> is as defined above; and X is acetal or ketal residue.
HU90204A 1989-01-21 1990-01-19 Process for selective etherification of ascorbinic acid derivatives HU208533B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1275589 1989-01-21

Publications (3)

Publication Number Publication Date
HU900204D0 true HU900204D0 (en) 1990-03-28
HUT53628A HUT53628A (en) 1990-11-28
HU208533B HU208533B (en) 1993-11-29

Family

ID=11814224

Family Applications (1)

Application Number Title Priority Date Filing Date
HU90204A HU208533B (en) 1989-01-21 1990-01-19 Process for selective etherification of ascorbinic acid derivatives

Country Status (8)

Country Link
US (1) US5008405A (en)
EP (1) EP0379968B1 (en)
JP (1) JP2830268B2 (en)
KR (1) KR900011751A (en)
AT (1) ATE116978T1 (en)
CA (1) CA2008125A1 (en)
DE (1) DE69015831T2 (en)
HU (1) HU208533B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5504108A (en) * 1990-01-12 1996-04-02 The Ohio State University Research Foundation Optically pure 4-aryl-2-hydroxytetronic acids
US5656662A (en) * 1990-01-12 1997-08-12 The Ohio State University Research Foundation Synthesis of optically pure 4-alkenyl- or 4-alkanyl-2-hydroxytetronic acids
US5399721A (en) * 1990-01-12 1995-03-21 The Ohio State University Research Foundation Synthesis of optically pure 4-aryl-2-hydroxytetronic acids
US5504107A (en) * 1990-01-12 1996-04-02 The Ohio State University Research Foundation Optically pure 4-alkenyl- or 4-alkanyl-2-hydroxytetronic acids and pharmaceutical use thereof
US5399717A (en) * 1993-09-29 1995-03-21 Merck & Co., Inc. Glycosidation route to 4"-epi-methylamino-4"-deoxyavermectin B1
JPH08134055A (en) * 1994-11-08 1996-05-28 Nippon High Potsukusu:Kk Production of 3-o-substituted-ascorbic acid
CA2324306C (en) * 1998-03-27 2005-05-24 Lg Chemical Ltd. Polyethoxylated ascorbic acid derivatives as a novel antioxidant and process for preparing thereof
KR100500503B1 (en) * 2001-05-30 2005-07-14 (주)코스몰 Process for preparing a crystal 3-0-alkyl ascorbic acid

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4552888A (en) * 1982-01-15 1985-11-12 Eli Lilly And Company Ascorbic acid ethers in angiogene
JPS60130582A (en) * 1983-12-19 1985-07-12 Takeda Chem Ind Ltd Antioxidant for food, ascorbic acid derivative and its production
ZA852614B (en) * 1985-05-17 1986-10-09 Takeda Chemical Industries, Ltd. Ascorbic acid ethers and their production
JP2515556B2 (en) * 1986-08-29 1996-07-10 武田薬品工業株式会社 Hydroxybutenolide derivative and method for producing the same

Also Published As

Publication number Publication date
KR900011751A (en) 1990-08-02
DE69015831T2 (en) 1995-07-27
HU208533B (en) 1993-11-29
DE69015831D1 (en) 1995-02-23
JPH02275874A (en) 1990-11-09
HUT53628A (en) 1990-11-28
EP0379968A2 (en) 1990-08-01
EP0379968A3 (en) 1991-02-06
ATE116978T1 (en) 1995-01-15
CA2008125A1 (en) 1990-07-21
EP0379968B1 (en) 1995-01-11
JP2830268B2 (en) 1998-12-02
US5008405A (en) 1991-04-16

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Legal Events

Date Code Title Description
HMM4 Cancellation of final prot. due to non-payment of fee